Table 1.

Estimates of economic value of forest patches A and B ( Fig. 1 ) to study farm, under seven different assumptions for minimum patch size required to sustain pollination services

Patch size threshold, ha Area near A and B and far from all other patches above threshold size, * ha Income resulting from A and B, $/yr None 235 30,000 5 270 35,000 10 363 47,000 15 450 58,000 20 480 62,000 25 480 62,000 30 480 62,000 • * Near area defined as within 1.0 km of forest. • Results rounded to the nearest$1,000 (see Methods).

• Same as assuming threshold of 18 ha (the size of the riparian strip; see Methods), because there are no patches >18 and <20 ha.